Sadomasochism

The deriving of pleasure, especially sexual gratification, from inflicting or submitting to physical or emotional abuse.

Sadomasochist

Someone who enjoys both sadism and masochism.

You know I bet Aloise (from black butler) is a giant Sadomasochist.

Sadomasochistic

The combination of sadism and masochism, in particular the deriving of pleasure, especially sexual gratification, from inflicting or submitting to physical or emotional abuse.